61.  When we go out of the "ivory tower" where is no understanding of real society, we will slowly improve our abilities to analyze and solve problems.

62.  We May have a travel or go to camp, If we have spare time, we can help the people whom needs help for no money , ect .

63.  Without keep touching with society, not only get no progress but also can't alive .

64.  It is easy to say and it is no significense to think only .

65.  We will serve for the world in no days .

66.  And they are no time and no way to know the society also .

67.  Moreover, they think 70 percent of the earth is occupied by Oceans , so we have no need to fear that water crisis will happen in future.

68.  Since there is plentys of fresh water in rivers or from raining or under the ground, people take for granted that it is no use worrying about the shortage of fresh water.

69.  Human being will dye out when the day comes that there is no fresh water at all.

70.  In normal life, people pay no care in using fresh water because they think there are great deal of raining water, riverwater , well water on the earth.